CYPERACE^E. 425 



lanceolate, compressed ; glumes lanceolate, obtuse ; sheaths truncate. 



8. glaucus Torr. ? 



HAB. Salt marshes. N. Y. July. U..Culm a foot high, 

 slender. Glumes obtuse, brownish. Bristles 4, longer than the 

 tubercle. Dr. Torrey's name had been appropriated to a British 

 species by Dr. Smith. 



9. S. tennis Willd. : culm very slender, quadrangular ; spike, ellipti- 

 cal, acute at each end ; glumes ovate,, obtuse j stamens 3 ; styles 3- 

 cleft ; seed rugose. " V n 



HAB. Swamps. N. Y. to Car. June, July. 11. Culm 812 

 inches high. Spike rather obtuse, dark brown. Bristles 23, 

 sometimes none, 



10. & planifolius Muhl. : culm triquetrous ; radical leaves flat,, nearly 

 equalling the culm ; spike terminal, oblong, compressed, shorter than 

 the cuspidate bracts at the base. 



HAB. Swamps. N. S. June. Z. Culms cespitose, 8 inches 

 high, scabrous on the angles. Spike lanceolate. Bristles 3 4, 

 longer than the nut. 



11. (S. subterminalis Torr. : culm floating, sulcate, inflated, leafy be- 

 low ; spike solitary, somewhat terminal, lanceolate; style 2- cleft ; 

 seed triquetrous. 



HAB. Ponds, &c. Mass. Aug. 2-. Culm 3 feet long, spongy. 

 Leaves very narrow. Spike shorter than the bract. * Bristles 6, 

 nearly as long as the triangular nut. 



tt Spikes numerous, aggregated. 



12. S. debilis Muhl. : culms cespitose, deeply striate ; spikes about 

 3, lateral, ovate, sessile ; glumes ovate," obtuse, mucronate. 



HAB. Margins of ponds. N. Y. to Car. Aug., Sept. 2-f. 

 Culms 8 12 inches high, with a few subulate leaves at base. 

 Spikes short, ovate > 2 3 inches from the top of the culm. 

 Bristles 45. 



13. S. americanus Pers. : culm nearly naked, triquetrous ; sides 

 concave ; spikes lateral, (15) ovate, conglomerate, sessile ; glumes 

 round-ovate, mucronate ; seed triquetrous, acuminate. 5>. triqueter 

 Mich. Sf. pungcns Vahl. Sprcng. 



HAB. Marshes and wet banks. N. Y. to Car. July. Zf. 

 Culm 2 5 feet high, slender, 3-sided. Spikes a short distance 

 . * from the top, ferruginous. Bristles 6. 



14. & lacustris Linn. : culm terete, attenuated above, naked ; pani- 

 cle sub terminal ; spikes peduncled, ovate. & validus Pursh. 



HAB. Ponds and marshes. N. Y. to Car. N, to Subarc. Amer. 

 June. H> Culm 4 8 feet high. Spikes in an unequal sub- 

 divided panicle or cyme. Bristles 4 6, hispid. ' 



15. S. acutus Muhl. : culm terete, (not attenuated,) spotted; pedun- 

 cles numerous, sublateral ; spikes oblong ; glumes pubescent, mucron- 

 ate. 



H*AB. sVamps. N. S. June, July. 2j..Culm 4 feet high, 

 36* 



